Long context

GPT-5.6 Luna API pricing

OpenAI's GPT series — broad general capability, wide ecosystem, and the native models behind Codex CLI.

Model IDopenai/gpt-5.6-luna

ChatStreamingTool callingVision

Get API Key Run your first request

Call summary

Input

$1.00$0.15/ 1M tokens

Cache write $0.15

Cache read $0.075

Output

$6.00$0.90/ 1M tokens

Context Window

1.05M

API Endpoints

GPT-5.6 Luna API endpoints

One API key — call this model through any of the 2 endpoints below.

POST/v1/chat/completionsOpenAI-compatible · Works for every model

Chat Completions reference

POST/v1/responsesResponses API · Native for Codex CLI

Responses API reference

Call GPT-5.6 Luna from your code

The same API key works across all 2 endpoints below.

Endpoint

/v1/chat/completions

Model ID

openai/gpt-5.6-luna

Request example

bash

curl -X POST \
  https://api.router.one/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "openai/gpt-5.6-luna",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

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More GPT models on Router One

17 other GPT models on the same gateway and API key — each page lists endpoints, posted price, and context window.

Codex Auto Review$0.50 in / $3.00 out per 1M1.05M context GPT-5.6 Sol$0.50 in / $4.00 out per 1M1.05M context GPT-5.6 Terra$0.25 in / $1.50 out per 1M1.05M context GPT-6.1 Sol$0.40 in / $2.00 out per 1M1.05M context GPT-6.1 Terra$0.20 in / $1.00 out per 1M1.05M context GPT-6 Astra$2.00 in / $10.00 out per 1M1.05M context GPT-6 Sol$0.40 in / $2.00 out per 1M1.05M context GPT Image 2$0.50 per image GPT Image 2.5 Flare$0.50 per image GPT Image 2.5 Sunburst$0.50 per image

7 channel versions

GPT-5.5 · Azure$3.75 in / $22.50 out per 1M1.05M context GPT-5.6 Luna · Azure$0.20 in / $1.20 out per 1M1.05M context GPT-5.6 Sol · Azure$3.00 in / $15.00 out per 1M1.05M context GPT-5.6 Terra · Azure$1.50 in / $9.00 out per 1M1.05M context GPT-6.1 Sol · Azure$1.50 in / $7.50 out per 1M1.05M context GPT-6 Astra · Azure$7.50 in / $37.50 out per 1M1.05M context GPT-6 Sol · Azure$1.50 in / $7.50 out per 1M1.05M context

GPT-5.6 Luna at a glance

GPT-5.6 Luna (model ID openai/gpt-5.6-luna) is a GPT-series text model on Router One. Posted rate: $0.15 in / $0.90 out per 1M tokens (was $1.00 in / $6.00 out). No Router One subscription plan includes GPT-5.6 Luna today; every call bills the wallet at its posted rate. Context window: 1.05M tokens. Accepts text, image; returns text. Endpoints: POST /v1/chat/completions (OpenAI-compatible), POST /v1/responses (Responses API, the Codex CLI path).

GPT-5.6 Luna FAQ

How much does GPT-5.6 Luna cost on Router One?

GPT-5.6 Luna is billed per token on Router One: $0.15 in / $0.90 out per 1M tokens, pay as you go.

Is GPT-5.6 Luna included in Router One subscriptions?

No Router One subscription plan includes GPT-5.6 Luna today; every call bills the wallet at its posted rate.

Which endpoints serve GPT-5.6 Luna?

GPT-5.6 Luna is served on 2 endpoints — POST /v1/chat/completions (OpenAI-compatible), POST /v1/responses (Responses API, the Codex CLI path). The same Router One API key works on each.

What is GPT-5.6 Luna's context window?

GPT-5.6 Luna accepts up to 1.05M tokens of context per request on Router One.

Start using GPT-5.6 Luna

Create an API key and call GPT-5.6 Luna at $0.15 in / $0.90 out per 1M tokens on Router One — pay as you go, with per-request cost and latency visibility.

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